Soil column experiments used as a means to assess transport, sorption, and biodegradation of pesticides in groundwater.
Soil column experiments are used to investigate the fate of three pesticides of high, intermediate, and low solubility in groundwater: N- phosphonomethyl glycine (glyphosate); O,O-diethyl-S-[(ethylthio)methyl]phosphorodithioate (phorate); (2,4-dichlorophenoxy)acetic acid (2,4-D). Feed solutions are prepared by adding each pesticide (100 mg/L glyphosate, 50 micro g/L phorate, 50 mg/L 2,4-D) along with conservative tracer, KBr, in synthetic groundwater. The concentration of the pesticides in effluents is detected by ion chromatography (glyphosate, 2,4-D) and GC-FID (phorate). The Br(-) breakthrough curves are employed to estimate the dispersion coefficient and mean pore velocity in each column. Solute transport and reactive models accounting for equilibrium/non-equilibrium sorption and biodegradation are coupled with inverse modeling numerical codes to estimate the kinetic parameters for all pesticides.
Magga
Zoi
Z
Foundation for Research and Technology Hellas-Institute of Chemical Engineering and High Temperature Chemical Processes, Patras, Greece.
Tzovolou
Dimitra N
DN
Theodoropoulou
Maria A
MA
Dalkarani
Theodora
T
Pikios
Konstantinos
K
Tsakiroglou
Christos D
CD
D015084:2,4-Dichlorophenoxyacetic Acid / Q000032:analysis / Q000737:chemistry; D000327:Adsorption; D001673:Biodegradation, Environmental; D005998:Glycine / Q000031:analogs & derivatives / Q000032:analysis / Q000737:chemistry; D007700:Kinetics; D010575:Pesticides / Q000032:analysis* / Q000737:chemistry*; D010702:Phorate / Q000032:analysis / Q000737:chemistry; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000032:analysis; D012995:Solubility; D014872:Water Movements; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry*; D000097797:Glyphosate
D015084:2,4-Dichlorophenoxyacetic Acid; D005998:Glycine; D010575:Pesticides; D010702:Phorate; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; D000097797:Glyphosate